Halowerk MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 54 installs a week from npm. Last commit 12 Aug 2026.
134 paid APIs as MCP tools, billed per call in USDC on Base. No account, no login.
Today is the operative word: we check Halowerk MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add halowerk-mcp -- npx -y halowerk-mcp
{
"mcpServers": {
"halowerk-mcp": {
"args": [
"-y",
"halowerk-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.halowerk-mcp]
command = "npx"
args = ["-y", "halowerk-mcp"]
{
"mcpServers": {
"halowerk-mcp": {
"args": [
"-y",
"halowerk-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"halowerk-mcp": {
"args": [
"-y",
"halowerk-mcp"
],
"command": "npx"
}
}
}
PathCourse Health inference SKUs as x402 paid MCP tools, billed per call in USDC on Base.
melis x402 Tools — 22 pay-per-call APIs for AI agents. No accounts, no API keys. USDC on Base.
Ethereum mainnet JSON-RPC paid per call in USDC on Base. No account, no API key: the wallet pays.
11 pay-per-call web tools for AI agents, auto-paid in USDC on Base via x402. No API keys.
Otto AI hosted MCP: 16 pay-per-call market-intelligence tools, USDC via x402 on Base, no API keys.
Pay-per-call agent tools via x402 (USDC on Base): chat, prices, funding, RNG. No account or keys.
AgisHub — pay-per-call tools for AI agents over x402 (USDC on Base). No API key.
Pay-per-call AI video generation over x402 (USDC on Base). No accounts, no API keys.
Answers built from our own checks of this server.